Legalizing 800,000 "Dreamers" would also be a political disaster that could irreversibly turn Florida and Texas into blue states. Trump has no interest in electing more open borders, left-wing Democrats.

John suspects that Trump's long-term strategy is to warm up to Democrats will pressuring Republicans to take a "hardline" stance, so the President looks cooperative while continuing to fulfill his campaign promises.

The answer to DACA is a strict application process for EACH “dreamer”. In order to be given some sort of status, they must have NO criminal record, NO history of gov’t support, and must be legally employed (confirmed by IRS).
Trump policies are lowering unemployment levels fast, so those jobs currently held by dreamers are, in most part, not needed for Americans but can be imperative for many American businesses, especially in farming, construction, and services.